Biology
Assertion (A): The most attractive, colourful part of a flower is calyx.
Reason (R): Calyx is the whorl of sepals which protects the young flower bud. Calyx, when green, also performs photosynthesis.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Flower
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Answer
A is False and R is True.
Reason — The most attractive and colourful part of a flower is the corolla (petals), not the calyx. The calyx is made up of sepals. It protects the young flower bud. When green, it can also perform photosynthesis.
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Related Questions
Assertion (A): Dioecious plants bear hermaphrodite flowers on different plants.
Reason (R): Dioecious plants bear staminate and pistillate flowers on the same plant.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): The kind of androecium in which the stamens are united in one group by their filaments is termed as Monadelphous.
Reason (R): Monadelphous stamens are found in Pea and Bombax flowers.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Calyx and corolla are considered as non-essential (or accessory) parts of a flower because they do not participate in the process of reproduction at all.
Reason (R): Calyx and corolla are not useless. They protect the reproductive parts of the flower. Corolla attracts insects for pollination which is the first step of reproduction.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Match the parts in column A with the flowers or parts of flower in column B.
Column A Column B Polyadelphous Polypetalous Pollen grains Calyx, corolla Free petals Nectar Non-essential Bombax Sweet fragrant fluid Pollen sac